package main

import "fmt"

type Vertex struct{
	X,Y int
}

var (
	v1=Vertex{1,2}
	v2=Vertex{X:1}
	v3=Vertex{}
	p=&Vertex{1,2}
)

func main() {
	fmt.Println(v1,p,*p,v2,v3)
}
